RL4AA info

[jank324]

We should add some kind of info on what the RL4AA collaboration is somewhere immediately findable on the page.

This should contain:

• What is the goal of the collaboration?
• Who to contact for questions? (us four)
• How to get your publication listed? (Create an issue here on GitHub I guess?)

[cr-xu]

I added a short contribution guide in the README, but yes we should probably also put it somewhere on the website.

[jank324]

I think we should have a Contacts page that lists us four and how to reach us and maybe gives other info like saying that you should create an issue on GitHub if you want your publication listet.

[jank324]

We can and should also make better use of the bit of text on the front page. Maybe a one to two sentence intro to RL4AA and a brief mention to look into Contacts regarding adding stuff ... or something like that.